mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, white to translucent color with yellowish iron staining, vitreous to greasy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65
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Physical properties
Hardness of 7 on the Mohs scale, white to translucent color with yellowish iron staining, vitreous to greasy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65
Formation & geological history
Formed through the weathering and prolonged water-transport of quartz veins or larger rock bodies, where softer minerals wear away leaving resistant quartz behind
Uses & applications
Commonly used in landscaping, decorative gravel, tumbling, and as a raw material for glass and silicon production
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, capable of surviving numerous cycles of weathering and erosion
Field identification & locations
Found worldwide in riverbeds, beaches, and glacial outwash; easily identified by its high hardness (scratches glass) and lack of cleavage
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Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Soil with Mineral Detritus and Quartz Fragments
Regolith / Silicate Mineral Aggregate
sedimentary
Limonite / Goethite (Iron Ore Mineral nodule)
FeO(OH)·nH2O / FeO(OH)
mineral
Septarian Pebble
Septarian nodule / Concretion
sedimentary
Schist
Schist
Metamorphic
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral